// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_VIEWS_CONTROLS_BUTTON_LABEL_BUTTON_BORDER_H_
#define UI_VIEWS_CONTROLS_BUTTON_LABEL_BUTTON_BORDER_H_

#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "ui/gfx/geometry/insets.h"
#include "ui/views/border.h"
#include "ui/views/controls/button/button.h"
#include "ui/views/painter.h"

namespace views {

// An empty Border with customizable insets used by a LabelButton.
class VIEWS_EXPORT LabelButtonBorder : public Border {
public:
    LabelButtonBorder();
    ~LabelButtonBorder() override;

    void set_insets(const gfx::Insets& insets) { insets_ = insets; }

    // Returns true if |this| is able to paint for the given |focused| and |state|
    // values.
    virtual bool PaintsButtonState(bool focused, Button::ButtonState state);

    // Overridden from Border:
    void Paint(const View& view, gfx::Canvas* canvas) override;
    gfx::Insets GetInsets() const override;
    gfx::Size GetMinimumSize() const override;

private:
    gfx::Insets insets_;

    DISALLOW_COPY_AND_ASSIGN(LabelButtonBorder);
};

// A Border that paints a LabelButton's background frame using image assets.
class VIEWS_EXPORT LabelButtonAssetBorder : public LabelButtonBorder {
public:
    explicit LabelButtonAssetBorder(Button::ButtonStyle style);
    ~LabelButtonAssetBorder() override;

    // Returns the default insets for a given |style|.
    static gfx::Insets GetDefaultInsetsForStyle(Button::ButtonStyle style);

    // Overridden from LabelButtonBorder:
    bool PaintsButtonState(bool focused, Button::ButtonState state) override;

    // Overridden from Border:
    void Paint(const View& view, gfx::Canvas* canvas) override;
    gfx::Size GetMinimumSize() const override;

    // Get or set the painter used for the specified |focused| button |state|.
    // LabelButtonAssetBorder takes and retains ownership of |painter|.
    Painter* GetPainter(bool focused, Button::ButtonState state);
    void SetPainter(bool focused, Button::ButtonState state, Painter* painter);

private:
    // The painters used for each unfocused or focused button state.
    scoped_ptr<Painter> painters_[2][Button::STATE_COUNT];

    DISALLOW_COPY_AND_ASSIGN(LabelButtonAssetBorder);
};

} // namespace views

#endif // UI_VIEWS_CONTROLS_BUTTON_LABEL_BUTTON_BORDER_H_
